/*
 * Copyright (C) 2009 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.weetop.aklyscan.activity.lanya;

import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.view.WindowManager;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;

import com.weetop.aklyscan.R;

import java.util.Set;

/**
 * This Activity appears as a dialog. It lists any paired devices and
 * devices detected in the area after discovery. When a device is chosen
 * by the user, the MAC address of the device is sent back to the parent
 * Activity in the result Intent.
 */
public class DeviceListActivity extends Activity {
    // Debugging
    private static final String TAG = "DeviceListActivity";
    private static final boolean D = true;

    // Return Intent extra
    public static String EXTRA_DEVICE_ADDRESS = "device_address";
    public static String EXTRA_DEVICE_TYPE = "device_type";
    public static String EXTRA_DEVICE_NAME = "device_name";
    // Member fields
    private BluetoothAdapter mBtAdapter;
    private ArrayAdapter<String> mPairedDevicesArrayAdapter;
    private ArrayAdapter<String> mNewDevicesArrayAdapter;
    Button scanButton;
    ImageView iv_back;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        try {
            // Setup the window
            requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
            WindowManager.LayoutParams params = getWindow().getAttributes();
            params.systemUiVisibility = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;  //隐藏虚拟键//沉浸式
            getWindow().setAttributes(params);

            setContentView(R.layout.device_list);

            // Set result CANCELED in case the user backs out
            setResult(Activity.RESULT_CANCELED);

            // Initialize the button to perform device discovery
            scanButton = (Button) findViewById(R.id.button_scan);
            scanButton.setOnClickListener(new OnClickListener() {
                public void onClick(View v) {
                    mNewDevicesArrayAdapter.clear();
                    doDiscovery();
                    v.setVisibility(View.GONE);
                }
            });

            // Initialize array adapters. One for already paired devices and
            // one for newly discovered devices
            mPairedDevicesArrayAdapter = new ArrayAdapter<String>(this, R.layout.device_name);
            mNewDevicesArrayAdapter = new ArrayAdapter<String>(this, R.layout.device_name);

            // Find and set up the ListView for paired devices
            ListView pairedListView = (ListView) findViewById(R.id.paired_devices);
            iv_back = findViewById(R.id.iv_back);
            pairedListView.setAdapter(mPairedDevicesArrayAdapter);
            pairedListView.setOnItemClickListener(mDeviceClickListener);

            // Find and set up the ListView for newly discovered devices
            ListView newDevicesListView = (ListView) findViewById(R.id.new_devices);
            newDevicesListView.setAdapter(mNewDevicesArrayAdapter);
            newDevicesListView.setOnItemClickListener(mDeviceClickListener);

            // Register for broadcasts when a device is discovered
            IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
            this.registerReceiver(mReceiver, filter);

            // Register for broadcasts when discovery has finished
            filter = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
            this.registerReceiver(mReceiver, filter);

            // Get the local Bluetooth adapter
            mBtAdapter = BluetoothAdapter.getDefaultAdapter();

            // Get a set of currently paired devices
            Set<BluetoothDevice> pairedDevices = mBtAdapter.getBondedDevices();

            // If there are paired devices, add each one to the ArrayAdapter
            if (pairedDevices.size() > 0) {
                findViewById(R.id.title_paired_devices).setVisibility(View.VISIBLE);
                for (BluetoothDevice device : pairedDevices) {
                    mPairedDevicesArrayAdapter.add(device.getName() + "\n" + device.getAddress());
                }
            } else {
                String noDevices = "无设备";
                mPairedDevicesArrayAdapter.add(noDevices);
            }
            iv_back.setOnClickListener(new OnClickListener() {
                @Override
                public void onClick(View v) {
                    finish();
                }
            });
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();

        // Make sure we're not doing discovery anymore
        if (mBtAdapter != null) {
            mBtAdapter.cancelDiscovery();
        }

        // Unregister broadcast listeners
        this.unregisterReceiver(mReceiver);
    }

    /**
     * Start device discover with the BluetoothAdapter
     */
    private void doDiscovery() {
        if (D) Log.d(TAG, "doDiscovery()");

        // Indicate scanning in the title
        setProgressBarIndeterminateVisibility(true);
        setTitle("Searching");

        // Turn on sub-title for new devices
        findViewById(R.id.title_new_devices).setVisibility(View.VISIBLE);

        // If we're already discovering, stop it
        if (mBtAdapter.isDiscovering()) {
            mBtAdapter.cancelDiscovery();
        }

        // Request discover from BluetoothAdapter
        mBtAdapter.startDiscovery();
    }

    // The on-click listener for all devices in the ListViews
    private OnItemClickListener mDeviceClickListener = new OnItemClickListener() {
        public void onItemClick(AdapterView<?> av, View v, int arg2, long arg3) {
            try{
                // Cancel discovery because it's costly and we're about to connect
                mBtAdapter.cancelDiscovery();

                // Get the device MAC address, which is the last 17 chars in the View
                String info = ((TextView) v).getText().toString();
                String address = info.substring(info.length() - 17);

                // Create the result Intent and include the MAC address
                Intent intent = new Intent();
                intent.putExtra(EXTRA_DEVICE_NAME, info.substring(0, info.length() - 17));
                intent.putExtra(EXTRA_DEVICE_ADDRESS, address);
                if (info.indexOf('|') >= 0)
                    intent.putExtra(EXTRA_DEVICE_TYPE, (int) Integer.valueOf(info.substring(info.indexOf('|') + 1, info.indexOf('|') + 2)));
                else intent.putExtra(EXTRA_DEVICE_TYPE, BluetoothDevice.DEVICE_TYPE_CLASSIC);
                // Set result and finish this Activity
                setResult(Activity.RESULT_OK, intent);
                finish();
            }catch (Exception e){
                e.printStackTrace();
            }
        }
    };

    // The BroadcastReceiver that listens for discovered devices and
    // changes the title when discovery is finished
    private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            String action = intent.getAction();

            // When discovery finds a device
            if (BluetoothDevice.ACTION_FOUND.equals(action)) {
                // Get the BluetoothDevice object from the Intent
                BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
                // If it's already paired, skip it, because it's been listed already
                if (device.getBondState() != BluetoothDevice.BOND_BONDED) {
                    mNewDevicesArrayAdapter.add(device.getName() + "|" + device.getType() + "\n" + device.getAddress());     //
                }
                // When discovery is finished, change the Activity title
            } else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) {
                setProgressBarIndeterminateVisibility(false);
                scanButton.setVisibility(View.VISIBLE);
                setTitle("新设备");
                if (mNewDevicesArrayAdapter.getCount() == 0) {
                    String noDevices = "无设备";
                    mNewDevicesArrayAdapter.add(noDevices);
                }
            }
        }
    };

}
